Fluxing device for lock and lap seam bodymakers



Nov. 7, 1933.

A. L. KRONQUEST FLUXING DEVICE FOR LOCK AND LAP SEAM BODYMAKERS Filed April 15, 1932 4 Sheets-Sheet l Nov. 7, 1933. A. L. KRONQUEST 1,934,357

FLUXING DEVICE FOR LOCK AND LAP SEAM BODYMAKERS Filed April 15, 1932 4 Sheets-Sheet 2 I l I t i i E @l 1 i 1 s 1: l

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Nov. 7, 1933. A. L. KRONQUEST FLUXING DEVICE FOR LOCK AND LAP SEAM B O DYMAKERS Filed April 15,- 1932 4 Sheets-Sheet 3 Nov. 7, 1933. A. L. KRONQUEST FLUXING DEVICE FOR LOCK AND LAP SEAM BODYMAKERS Filed April 15, 1932 4 Sheets-Sheet 4 Patented Nov. 7, 1933 UNITED STATES FLUXING DEVICE FOR LOCK AND LAP SEAM BODYMAKERS Alfred L. Kronquest, Syracuse, N. Y., assignor to Continental Can Company, Inc-., New York, N. Y., a corporation of New York Application April 15, 1932. Serial No. 605,511

4 Claims.

The invention relates to new and useful improvements in a iiuxing device for a can bodymaker. It has been a common practice in the making of a lock and lap side seam in a can body to pass the underlapping sections of the side seam beneath a device for applying flux thereto.

An object of the present invention is to provide an auxiliary fiuxing device which operates in conjunction with the main fluxing device for applying an additional coating of flux to the outer face of the. underlapping section which isto form the top end of the completed can body.

A further object of the invention is to provide an auxiliary fluxing device of the above type which is mounted on the presser bar holding the can body in a fixed position in the bodymaker, which fiuxing device is actuated". by the reciproe eating movements of the presser bar.

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

. In the drawings whichv show by way of illustration one embodiment of the invention:

Fig. 1 is a perspective view of a portion of a bodymaker with the improved fluxing device applied thereto.

Fig. 2 is a view partly in plan and partlyin section of a portion of the bodymaker with the fluxing devices attached thereto.

Fig. 3 is a View partlyin section'and partly in side elevation of a portion of the bodymaker having the iluxing devices applied thereto.

Fig. 4 is a transverse sectional view through a portion of the machine and showing the iluxing pad and the devices associated therewith in end elevation.

Fig. 5 is an: enlarged sectional view through the bed, the presser bar and showing the fiuxing device in end elevation.

Fig. 6 is a view partly in side elevation and partly in vertical section of the fluxing pad holder showing the fluxing pad and the manner of applyin flux thereto.

.Fig. 7 is avertical sectional view through the fiuxing device showing the pad in contact with the blank.

Fig. 8 is a detail showing the-.presser bar bearing on the blank. 00 Fig. 9 is a similar View showing the upturned portion of metal to form the hook on the blank and with the projecting lapping portion which is to be fiuxed.

Fig. 10 is a similar view showing the final formation of thehook.

Fig. 11 is a blank for forming a lock and lap seam can body with the hooks formed thereon.

Fig; 12 is a view showing the blank bent-intocylindrical form for interlocking the hooks.

Fig. 13 is a detail through the same showing the locking of the side edges. 1

Fig. 14 is a detail with parts broken away and parts in section to show the top portion of the container as viewed from the outside thereof and showing through the. broken away portion the underlap which is fiuxed by the improved fluxingdevice.

The invention is directed particularly tozthe mechanism for applying flux to the lapping portions of the side seam of a lock andlap: seam; can 7 body; In Fi .8 of the drawings, a body; blank-isindicated at 1. This body blank is slit and the portion between the slits turned back to form a hook 2. The opposite end of the body blank is cut away at thecorners as indicated at3 andanunderfolded hook 4 is formed which interlocks; with hook 2'. The hook 2 is the inner hook. The outer surface of the hook 4 is fluxed in the usual man zner and this is all the flux necessary to apply to, the interlocked portions of the side seam. The section indicated at 5 in the blank underlaps the portions at the end of the hook 4. Likewisethe section indicated at 6 underlaps-the sectionat. the other end of the hook 4.

In Fig. 14 of the drawings, the lapped section of the side seam at the top of the can is indicated. The portion of the seam' formed by interlocking thehooks 2 and 4 is-indicated at '7. The underlapped section is shown as exposed by cutting awaythe outer lapped portion of the body in this Fig. 10. In order to make an eiiicient solder bond for this portion of the side seam, the entire surface. of the outer'face of the underlapping section should be applied with flux so that a solder bond will'extend all the way from the edge 6a to the opposite edge of the side seam as indicated at 619.

In the making of a can body after the side seam is formed, the bottom end is attached to the can body and then the can may be tested to see whether there is a leak anywhere in the side seam or the double seam joining the bottom to the-can body. If there is any weakness in the lapped portion in the bottom end of the side seam, it will show during the testing. The top end of the can is attached by the-packer andunder conditionsless favorable than in the forming of the double seam which joins the bottom end to the can body. It is essential therefore that this solder bond atthe top end of the side seam shall include anefiicien-t bonding throughout the entireregionso as to avoid all possible chances of a leak after the final closing of the can with the food product therein.

In order that this solder bond joining the lapped sections at the top of the side seam shall be very eflicient and shall extend throughout the entire region of the lapped sections, it is essential that this portion of the body blank be efficiently fluxed and that the flux coating shall extend substantially throughout the entire region which is to be solder bonded. It has been a common practice to pass the body blank underneath a mechanism for applying flux to the outer faces of the underlapping sections of the side seam. The present invention has to do with an auxiliary mechanism for applying an additional coating of flux to the outer face of this underlapping section which is to form the top end of the complete ed can body.

In Fig. 1 of the drawings a portion of a body maker is shown more or less diagrammatically and the improved fluxing device is shown applied thereto. The bodymaker includes a supporting bed 8 along which the blanks are fed by feed bars, one of which is indicated at 9. Said feed bar is provided with a series of feed fingers 10 and the body blanks 1 are fed intermittently, first to a notching station where the" body blank is notched and then to a station where a preliminary turning of the hooks occurs and then to a station where the hooks are finally formed. The bodymaker is preferably of the type shown and described in the patent to Troyer 1,772,820, granted August 12, 1930 and further description of the bodymaker is not thought necessary.

Extending along each side of the supporting bed 8 are presser bars, one of which is shown at 11. The presser bar 11 is carried by arms 13, 13 attachedto a sleeve 14. The sleeve 14 is provided with an arm 15 carrying a roller 16 which l engages a cam 17. This cam as it rotates, op-

erates through the arm 15 to lower the presser bar. The presser bar is raised by a spring 18 surrounding a rod 19. The rod 19 is mounted for free movement in a bracket 20 which is bolted to the presser bar by bolts 21, 21.

The spring bears against the underface of the arm and against a shoe at the lower end of the rod and is constantly urging the presser bar away from p the bed 8. 7

section is indicated at 11c.

-When the cam releases the arm 15, the presser bar is moved down so as to clamp the blank beneath the same. The presser bar is preferably made in two sections. The lower work-engaging This lower section 11a is carried by guide bolts 22, 22, which are headed so as to limit the downward movement of the section when the presser bar as a whole is lifted. Springs 23, 23 between the two sections of the presser bar yieldingly force the lower section downward. When the presser bar is lowered onto the material, it is clamped by this lower section 1111 and the movement of the upper section 11 will compressthe springs 23 and thus yieldingly press the lower section so as to firmly clamp the blank in a set position for the operation of the notching and hook-forming devices.

The machine is provided with the usual means for applying flux to the outer face of a hook 4 and this flux applying means is not shown. The machine is also supplied with the usual device for applying flux to the outer face of the lapping sections 5 and 6. As shown in the drawings, this is in the form of aroller which is indicated at 24. The roller is mounted for free'movement in a carrier 25 which is pivoted at 26 to a, bracket 27 31 and thus the flux is fed very slowly by capil- V iary attraction to the pipe 31 and only drips from thepipe through'the tube onto the roller. The roller is so located that the lapping sections 5 and 6 only pass beneath the same. This is during a movement of the blank through the reciprocation of the feed bars 9. As the lapping sec tions 5 and 6 pass beneath the roller, each section will be'supplied with a certain amount of fiux-..

In order to apply an additional coating of flux to the outer face of the lapped section 6, an auxiliary flux applying device has been provided. Attached to the presser bar 11 is the body portion 33 of the auxiliary flux applying device. The bracket 20'is removed and this body portion 33 placed between the bracket and the presser bar and the bolts 21, 21 firmly clamp this auxiliary fluxing device to the presser bar so that it has a fixed relation thereto and moves up and down with the presser bar.

.The body portion 33 is provided with a depending member 34 which is dovetailed in cross section and a fluxing pad 35 is secured therein. Extending through the body portion is a channel 36 whichv extends at an angle at its lower end and a port 37 leads from this channel to the pad 35. At the upper end of the channel 36, and'carried by the body portion 33, is a funnel 38. A pipe 39 leading from the reservoir 32 slowly discharges flux into the funnel 38 and the flux passes through the channel 36, thus supplying the pad 35. Thus the pad is saturated with flux.

When the presser bar is moved into contact with a blank for holding the same for the forming of .the hooks, it is also moved into contact with the blank indicated at 1a in Fig. 1 of the drawings, which blank has the hooks already formed thereon. The blank is thus clamped firmly at the fluxing station. When the presser bar moves downward, the pad 35 will be brought into contact with the outer face of the lapping sectionfi of the blank 1. This pad is of sufiicient size so as to substantially cover the entire lapping section and thus it is that an additional coating of 'flux is applied to this section. It is true that this additional coating is applied before the roller passes over the lapping section 6 and applies its coating thereto. Between the pad and the. roller a very efiicient coating of flux is applied to the lapped section 6 throughout the entire region of the lapping sections. This insures a perfect solder bond joining the lapping sections of the side sea'm at the top end of the completed can body. 7

It will be understood that in place of the flux- -ing roller, other fluxing means may be used. The essential feature is that the portion of the lapping section of the side seam shall have a coating of flux applied thereto while the blank is stationary and by a fluxing means which is yieldingly forced into contact therewith throughout the entire region that is to be fluxed.

While the invention is shown as applied to the understood from certain aspects thereof, that it may be used in connection with a side seam which is lapped throughout the entire length thereof and has no hooks for locking the same. It is important that the side seam at the top end thereof to which the cover is to be attached after the can is filled, shall be well fluxed so as to insure a very efficient solder bond at the top end of the side seam. The fiuxing device as described above may be applied to a lap seam bodymaker and positioned so as to supply this additional flux in the region desired.

It is obvious that minor changes in the details of construction and arrangement of parts may be made without departing from the spirit of the invention as set forth in the appended claims.

Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent is:

l. The combination of means for feeding can body forming blanks, means for applying flux to the sections thereof forming the lapped portions of the side seam and intermittently operated auxiliary means for applying an additional coating of flux to the end of the side seam which is at the top of the completed body.

2. The combination of means for intermittently feeding can body forming blanks, means for applying flux to the sections of the blank forming the lapped portions of the side seam, a fluxing pad for applying an additional coating of flux to the upper face of the underlapping section of the can body at the end of the side seam which is at the top of the completed body, means for intermittently moving said pad into contact with the blank while the blank is stationary, and means for saturating said pad with flux.

3. The combination of means for intermittently feeding can body forming blanks, a presser bar for clamping the blanks while stationary, means for intermittently raising and lowering the presser bar, a flux applying member carried by the presser bar and contacting with one of the lapping sections of the side seam when the presser bar is in engagement therewith, and. means for supplying flux to said members.

4. The combination of means for intermittently feeding can body forming blanks, a presser bar for clamping the blanks while stationary, means for intermittently raising and lowering the presser bar, a fiuxing pad carried by the presser bar and adapted to contact with the upper face of the underlapping section of the blank at the end of the side seam which is at the top of the completed body when said presser bar is in contact with the blank, and means for supplying flux to said pad.

ALFRED L. KRONQUEST, 

